The Meaning of "Child" in the Shari'ah and in Language

Question:
He says: Honorable Shaykh, may Allah grant you success, does "child" (al-walad) refer to both male and female, or does it refer only to the male? And in the saying of the Prophet (peace and blessings be upon him), "When a son of Adam dies, his deeds are cut off except for three," and he mentioned a righteous child who prays for him, does this refer only to the male, or to both male and female?

Answer:
In the speech of the common people, "child" is specific to the male, but in the language of the Shari'ah and the Arabic language, "child" includes both male and female. Yes.